On June 9th, Ji Zhaojun, Wang Guoqiang, Li Hongbin of Dinglu Town, Jiangdu City, and Qiao Zhengxin of Dinggou Town of Jiangdu City and Zhou Guangjin of Goutou Township of Rugao City called the newspaper “The Pastoral Doctor 110†to reflect that the early spring silkworm cultivation was in good condition and the whole growth cycle was basically the same. There is no disease, and it is time for silkworms to die. However, the spring silkworms have shown no phenomenon of "mounting" and not producing silkworms. They asked: What is the problem with silkworms that do not have scab? The reporter interviewed Hu Jian, deputy director of the Sericulture Management Division of the Jiangsu Provincial Agriculture Commission, and Hu Jian said that this year's silkworm rearing areas in our province have experienced different levels of silkworm to crusting when they are not able to “hang up†the mountain. This may be In relation to the climate of continuous drought and the air pollution in the previous period, the rate of “mountain upswing†in spring silkworms in various places has been different. At present, the spring eel in Wujiang City has been weighed, but the phenomenon that spring silkworms in Jiangdu are not “uphill†is relatively serious. . According to Zhou Lei of the Jiangdu Sericulture Guidance Institute, this year's Jiangdu spring silkworm does not “take up the mountain†to occur more often. Dinghu town, Dinggou town, Guocun town, Xiaoji town and other places have occurred more seriously, about 95% of the silkworm It can't be normal. After learning about the situation of the silkworm farmers, relevant technicians from the Jiangmen Sericulture Guidance Institute went to the Institute of Sericulture at the Chinese Academy of Agricultural Sciences together with some silkworm farmers and representatives from the town to carry out laboratory tests on silkworms that could not normally go uphill. The test results showed that It may be that during the early period of sericulture production, the climate was relatively dry and there was no rainfall, resulting in more pollutants on the mulberry leaves, toxic and harmful substances attached to the mulberry leaves, and the toxic substances gradually accumulated in the silkworm body after the mulberry leaves are ingested by the silkworm. of. In addition, they also took some silkworms that could normally lay silkworms to carry out relevant laboratory tests. They found that although these silkworms could normally spit silk, the “filament lines†of spit were half as thin as in previous years, and the silkworm spores were transparent in the past. This year, the silky spit is yellow or red, indicating that the silkworm has been "injured." Zhou Lei gave reporters an example of why this year's silkworms failed to lay off. In the Danyang area, Danyang rains artificially once. Danyang West is not within the artificial rainfall range. A completely different phenomenon has emerged. The silkworms in the east of Danyang have a relatively high scab rate and the rate of scab in the west of Danyang is relatively low. In addition, the reporter also interviewed the relevant staff of the Rugao City sericulture instruction station. They indicated that 20% to 30% of the spring silkworms in Rugao can't be successfully scabbed this year, and the silkworms that can't grow scabies show slow crawling and climbing up the mountain. The phenomenon of falling down again was mainly related to the sudden drop in temperature in the previous period. From the afternoon of May 20th, the local temperature in Rugao temporarily dropped from the high temperature of 33°C to 16.5°C, and the temperature on May 23 was only 14.5°C. The two most extreme temperatures encountered in sericulture production have been encountered, resulting in a decline in silkworm physique. In addition, they also carried out laboratory tests on silkworms that could not be normally picked up and found that some silkworms were infected with some bacterial diseases such as pyoderma and myiasis. Of course, due to the early adoption of measures such as warming of the silkworm chambers during the early cooling period, the phenomenon of silkworms not causing scabs is relatively rare. Is it because silkworms cause silkworms to not appear "uphill"? Hu Jian said that if it is impossible for silkworm not to produce scab if it is caused by the quality of silkworm eggs, then the corresponding pathological changes will occur during the early growth and development of the silkworm, and it will not appear until the late growth stage, but the fact is this year. The silkworm has no disease during the entire growth cycle, and it should not be caused by the quality of silkworm eggs. In addition, the staff of Haimen Sericulture Guidance Station also stated that the silkworm species that the farmers returned from the Sericulture Station were all ordered from the Jiangsu Provincial Silkworm Breeding Company. It should not be caused by the “uphill†phenomenon caused by the silkworm species problem.
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